a276308a AMIC Technology Corporation, a276308a Datasheet - Page 4

• Manufacturer Part Number: a276308a
• Description: 64k X 8 Otp Cmos Eprom
• Manufacturer: AMIC Technology Corporation

Functional Description
Read Mode
The A276308A has two control functions, both of which
must be logically active in order to obtain data at the
outputs. CE is the power control and should be used for
device selection. OE is the output control and should be
used to data to the output pins, which is independent of
device selection. Assuming that addresses are stable,
address access time (t
to output (t
(t
been low and the addresses have been stable for at least
t
Standby Mode
The A276308A has a standby mode which reduces the
active current from 30mA to 100 A. The A276308A is
placed in the standby mode by applying a CMOS high
signal to CE . When in the standby mode, the output are
in a high impedance state, independent of the OE .
Absolute Maximum Ratings*
Ambient Operating Temperature (T
Storage Temperature Plastic Package (T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 C to 125 C
Applied Input Voltage (V
Output Voltage (V
Notes:
1. During voltage transitions, the input may undershoot GND to -2.0V for periods less than 20 ns. Maximum DC voltage on
2. When transitions, A9 and VPP may undershoot GND to -2.0V for periods less than 20 ns. Maximum DC input voltage
(December, 2001, Version 1.0)
AA
OE
input and I/O may overshoot to VCC + 2.0V for periods less than 20 ns.
on A9 and VPP is +13.5V which may overshoot to 14.0V for period less than 20 ns.
- t
) from the falling edge of OE , as long as CE has
All Pins Except A9, VPP and VCC . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to VCC + 0.6V
A9, VPP . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 13.5V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 7.0V
OE
.
CE
). Data is available at the output after a delay
O
) . . . . . . . . . . . . -0.6V to 7.0V (Note 1)
AA
I
):
) is equal to the delay from CE
A
) . . . . -10 C to +85 C
STG
) . . . . . . . . . .
3
Auto Identify Mode
The auto identify mode allows the reading out of a binary
code from a EPROM that will identify its manufacturer and
type. This mode is intended for use by programming
equipment for the purpose of automatically matching the
device
programming algorithm.
To activate the mode, the programming equipment must
apply 12.0V
Three identification code can be read from data output pin
by toggling A0 and A1. The other addresses must be held
at V
represents the manufacturer code which is 37H. Byte 1
and Byte 2 represent the device code and continuation
code, which is 2CH and 7FH respectively. All identifiers for
these codes will possess odd parity, with MSB (IO
defined the parity bit.
*Comments
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to this device.
These are stress ratings only. Functional operation of this
device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied or intended. Exposure to the absolute
maximum rating conditions for extended periods may
affect device reliability.
IL
during this mode. Byte 0 (with A0 at V
to
be
0.5V on address line A9 of the A276308A.
programmed
AMIC Technology, Inc.
with
its
A276308A
corresponding
IL
, A1 at V
IL
7
)
)